NVIDIA is reportedly preparing faster mobile GPUs based on Maxwell, with a GTX 980MX and 970MX on the way.

The new GTX 980MX would sit between the GTX 980M and the laptop version of the full GTX 980, with 1664 CUDA cores (compared to 1536 with the 980M), 104 Texture Units (up from the 980M's 96), a 1048 MHz core clock, and up to 8 GB of GDDR5. Memory speed and bandwidth will reportedly be identical to the GTX 980M at 5000 MHz and 160 GB/s respectively, with both GPUs using a 256-bit memory bus.

The GTX 970MX represents a similar upgrade over the existing GTX 970M, with CUDA Core count increased from 1280 to 1408, Texture Units up from 80 to 88, and 8 additional raster devices available (56 vs. 48). Both the 970M and 970MX use 192-bit GDDR5 clocked at 5000 MHz, and available with the same 3 GB or 6 GB of frame buffer.

WCCFtech prepared a chart to demonstrate the differences between NVIDIA's mobile offerings:

Model

GeForce GTX 980 Laptop Version

GeForce GTX 980MX

GeForce GTX 980M

GeForce GTX 970MX

GeForce GTX 970M

GeForce GTX 965M

GeForce GTX 960M

Architecture

Maxwell

Maxwell

Maxwell

Maxwell

Maxwell

Maxwell

Maxwell

GPU

GM204

GM204

GM204

GM204

GM204

GM204

GM107

CUDA Cores

2048

1664

1536

1408

1280

1024

640

Texture Units

128

104

96

88

80

64

40

Raster Devices

64

64

64

56

48

32

16

Clock Speed

1218 MHz

1048 MHz

1038 MHz

941 MHz

924 MHz

950 MHz

1097 MHz

Memory Bus

256-bit

256-bit

256-bit

192-bit

192-bit

128-bit

128-bit

Frame Buffer

8 GB GDDR5

8/4 GB GDDR5

8/4 GB GDDR5

6/3 GB GDDR5

6/3 GB GDDR5

4 GB GDDR5

4 GB GDDR5

Memory Frequency

7008 MHz

5000 MHz

5000 MHz

5000 MHz

5000 MHz

5000 MHz

5000 MHz

Memory Bandwidth

224 GB/s

160 GB/s

160 GB/s

120 GB/s

120 GB/s

80 GB/s

80 GB/s

TDP

~150W

125W

125W

100W

100W

90W

75W

These new GPUs will reportedly be based on the same Maxwell GM204 core, and TDPs are apparently unchanged at 125W for the GTX 980MX, and 100W for the 970MX.